Which of the following transactions definitely require online transaction processing and cannot work on batch processing approach?

In object oriented programming, ____________ is used to create an "is a" relationship among classes.

a. inheritance b. progression c. logic d. elimination

To digitally record sound, __________ of a sound wave is/are collected at periodic intervals and stored as numeric data in an audio file.

Fill in the blank(s) with the appropriate word(s).